# DiagnosUs vs Smart AI Quizzer

The clearest difference is in-app purchases: DiagnosUs at none against Smart AI Quizzer's 2. DiagnosUs also leads on ads (none vs shown) and update cadence (fortnightly vs every 2 months). Smart AI Quizzer's advantage is iOS requirement (13.0 vs 16.0). On price and device support there is nothing between them.

Both are free to download. Smart AI Quizzer sells 2 in-app purchases, starting at $6.99 per month. DiagnosUs asks for nothing beyond the download.

DiagnosUs ships an update fortnightly, Smart AI Quizzer every 2 months. The most recent releases landed on November 2, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | DiagnosUs | Smart AI Quizzer |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (1K ratings)](https://appshunter.io/ios/app/diagnosus/id1369759559/reviews)** | — |
| Number of ratings | **1K** | — |
| Positive reviews | 79.4% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Fortnightly** | Every 2 months |
| Monetization | Free with in-app purchases | — |
| Size | 42 MB | 38 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Centaur Labs](https://appshunter.io/developer/1369759558) | [ANTARES TECHNOLOGY LLC](https://appshunter.io/developer/1811230279) |

## What reviewers say

### DiagnosUs

[App page](https://appshunter.io/ios/app/diagnosus/id1369759559)

Engage with real medical cases to enhance your diagnostic skills and earn rewards. This educational game is designed for students and professionals to test their knowledge across various specialties and contribute to AI research.

**Highlights:** Analyze diverse medical cases, Improve diagnostic skills, Earn rewards for participation, Contribute to AI research, Study for medical exams, Regularly updated datasets

**In-app purchases:** none

**What reviewers like**

- 💰 Earn money while learning
- 🧠 Helpful for medical students and professionals
- 🤓 Interesting and educational content
- 👍 Fun and engaging app
- 🤝 Responsive and helpful support team

**What reviewers complain about**

- 🐛 Bugs and technical issues (crashes, freezes, slow loading)
- ⏱️ Time-consuming to compete and earn rewards
- 🤖 Inconsistent or inaccurate AI-graded answers
- 🤑 Difficult to earn significant amounts of money
- 🔒 Withdrawal issues for some countries

**Reported bugs**

- App crashes and freezes
- Inaccurate or inconsistent grading of answers
- Withdrawal and payment issues for some users
- Compatibility problems with certain devices and OS versions

**Requested features**

- More diverse medical topics and case studies
- Separate competitions for students vs. professionals
- Ability to discuss and provide feedback on cases
- Improved instructions and explanations
- Compatibility with older devices and iOS versions


### Smart AI Quizzer

[App page](https://appshunter.io/ios/app/smart-ai-quizzer/id6746080283)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Standard Plan | $6.99 | per month |
| Premium Plan | $12.99 | per month |


## Frequently asked questions

### Is DiagnosUs free?

DiagnosUs is free to download, with no in-app purchases.

### Is Smart AI Quizzer free?

Smart AI Quizzer is free to download, with in-app purchases available.

### Do DiagnosUs or Smart AI Quizzer have ads?

Smart AI Quizzer shows ads; DiagnosUs does not.

### Which is updated more often, DiagnosUs or Smart AI Quizzer?

DiagnosUs ships an update fortnightly, and Smart AI Quizzer every 2 months. Most recently, DiagnosUs was updated on November 2, 2026 and Smart AI Quizzer on November 5, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*